SOLUTION: Solve the following system of equation using ADDITION to eliminate one variable. If the system has no solution, indicate that it is inconsistent; if it has infinite solutions, indi

Question 628445: Solve the following system of equation using ADDITION to eliminate one variable. If the system has no solution, indicate that it is inconsistent; if it has infinite solutions, indicate that it is dependent, if the system has one solution, Check the Answer.
-y=2x
3x+y=20
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
): Solve the following system of equation using ADDITION to eliminate one variable. If the system has no solution, indicate that it is inconsistent; if it has infinite solutions, indicate that it is dependent, if the system has one solution, Check the Answer.
-y=2x
3x+y=20
------Rearrange:
2x+y = 0
3x+y = 20
---
Subtract to get:
x = 20
---
solve for "y":
y = -2x
y = -40
----
One solution: System is independent; system is consistent
===============
Cheers,
Stan H.
===============
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